# Cadcorp SIS

The Cadcorp Spatial Information System® (Cadcorp SIS®) is an integrated family of geospatial products comprising desktop, web, and developer applications.

Cadcorp SIS Desktop connects directly to the Ordnance Survey Data Hub through dedicated wizards.

## What you need

* OS Vector Tile API added to an API project in the OS Data Hub with an API Key; see [getting-started-with-an-api-project](https://docs.os.uk/os-apis/core-concepts/getting-started-with-an-api-project "mention") for more information
* Cadcorp SIS (version SIS 9 or later)

## Instructions

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**Add overlay**

Once a new map has been set up, in the Home tab, click *Add Overlay*.

<figure><img src="https://4043944746-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FoEzqrBzRGoJw7nQyLj1W%2Fuploads%2Fgit-blob-4db56d00bdef8b6165f967b8d2404b5974314730%2FAdd-Overlay-Wizard.png?alt=media" alt="Cadcorp SIS Desktop UI highlighting Add Overlay button."><figcaption><p>Cadcorp SIS Desktop UI with the Add Overlay button highlighted.</p></figcaption></figure>
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{% step %}
**Select API**

In the Overlay Types dialog:

* Select *Ordnance Survey (GB) > OS (GB) Data Hub*, and then click *Next*.

In the OS (GB) Data Hub dialog:

* Select \_OS Vector Tile API.
* **API Key**: Enter your API Key.
* **Premium/Public Sector Plan**: Select this option if you have this plan.
* **Save in the UI settings database (encrypted)**: Select this option.
* Click *Next*.

<figure><img src="https://4043944746-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FoEzqrBzRGoJw7nQyLj1W%2Fuploads%2Fgit-blob-445879ba7ee214adf820ded182d0472e5bf33bdd%2Fimage.png?alt=media" alt="Cadcorp SIS Desktop OS (GB) Data Hub dialog"><figcaption><p>Cadcorp SIS Desktop OS (GB) Data Hub dialog.</p></figcaption></figure>
{% endstep %}

{% step %}
**Adding layers to the map**

In the OS (GB) Data Hub Vector Tile API dialog, select the appropriate layer from the list of available options, and then click *Finish*.

<figure><img src="https://4043944746-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FoEzqrBzRGoJw7nQyLj1W%2Fuploads%2Fgit-blob-0708ff7c0733290b1bf9bfb9c85bb58670c94f83%2Fimage.png?alt=media" alt="Cadcorp SIS Desktop OS (GB) Data Hub Vector Tile API dialog"><figcaption><p>Cadcorp SIS Desktop OS (GB) Data Hub Vector Tile API dialog.</p></figcaption></figure>

*The selected layer will then display in the* SIS Workspace Definition (SWD) \_and the data will display in the map area:

<figure><img src="https://4043944746-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FoEzqrBzRGoJw7nQyLj1W%2Fuploads%2Fgit-blob-b8c96f625c7909235695ffc7fa379d0738f09599%2Fimage.png?alt=media" alt="Cadcorp SIS Desktop showing loaded OS Vector Tiles in SWD and map area"><figcaption><p>Cadcorp SIS Desktop UI showing OS Vector Tile API in the map area.</p></figcaption></figure>
{% endstep %}
{% endstepper %}